Farm pro 2430 hydraulic issues

[Dsdecker7]

How do I bleed the air from hydraulic system after replacing a couple lift cylinder lines and cartridge filter?

 

[claggstractors]

Run the loader up and down until it operates smoothly.

 

[Dsdecker7]

Have been for a few hours now. It’s jerky and slow

 

[claggstractors]

OK. did you happen to clean out the strainer screen? Been a few years since I've dealt with a 30HP Jinma but IIRC there is a strainer where the hydraulic pump suction line hooks up to the reservoir.

 

[oldnslo]

Where was the filter located that you changed. If on inlet or suction side of pump and not OEM they can cause pump to cavitate - starve for oil which would create symptoms you are describing. So would strainer screen clagg references.

 

[Dsdecker7]

Where is the strainer screen? I didn’t use an oem filter. Not available near me

 

[oldnslo]

Did the system operate correctly before you changed the lines and filter?

Are all of the loader functions slow and jerky?

If you operate the tractor at lower RPM does the system smooth out?

If answer to the questions above is yes I would suspect new filter is the problem.

Strainer would be located inside the reservoir on most tractors transmission case. I would suggest following the inlet line back to where it connects to the transmission housing. On some tractors there a cover that you remove to access the strainer in that location.

 

[Dsdecker7]

Where was the filter located that you changed. If on inlet or suction side of pump and not OEM they can cause pump to cavitate - starve for oil which would create symptoms you are describing. So would strainer screen clagg references.

The filter is on the left side and hooks to a hard line in fluid tank under seat

Did the system operate correctly before you changed the lines and filter?

Are all of the loader functions slow and jerky?

If you operate the tractor at lower RPM does the system smooth out?

If answer to the questions above is yes I would suspect new filter is the problem.

Strainer would be located inside the reservoir on most tractors transmission case. I would suggest following the inlet line back to where it connects to the transmission housing. On some tractors there a cover that you remove to access the strainer in that location.

no it started getting jerky before I changed the filter. Yes all functions are jerky. No on the lower rpm. Thanks for your help

 

[TTTTTT]

#1, check level. If low you will be sucking air and getting that effect. I'm sure you lost a bit after doing your cylinders

 

[Dsdecker7]

is the 3 pt and fel on the same hydraulic pump

 

[oldnslo]

Ds
What you are describing sounds like a restriction or air leak in the pump inlet.

I would first attempt to locate the suction strainer the Clagg referenced.

On most tractors the same pump operates the FEL and 3 point. How many hoses or lines connect to the FEL valve?

Not sure how your tractor is made but some models have a block usually under the seat that directs oil to FEL or 3 point.

If possible I would suggest that you start tracing the lines from your pump to see where they go. Does the pressure line go directly to the FEL valve or some block on the transmission housing?

 

[claggstractors]

is the 3 pt and fel on the same hydraulic pump

Should be. Been trying to find at least some parts illustrations but striking out. Pictures would be helpful. Maybe able to trace out what is where on this one then. Been too many years since I've laid hands on 30HP Jinma. Were more of the 20 and 25HP ones sold here and IIRC the 30 hp was laid out differently.

 

[TTTTTT]

Yes should be. It's an open centre system. The engine continuously drives the pump . It circulates getting suction from the sump and pumps through the entire system. When you activate a valve, 3pt, fel or other your forcing fluid to activate it. At high pressure up to 2000 psi. depending on your engine rpms . I assume your relief valve is set around 2200 psi. I assume your sump around 12 to 15 l.s My DF being a common sump with the gears holds around 25 liters. I still would check level 1st, then any possibility of air getting in somewhere.

 

[Dsdecker7]

I have ordered the correct hydraulic filter to see if that’s the issue. Does anybody know how much hydraulic fluid it holds? Thanks for all the help

 

[TimberFarm]

I have ordered the correct hydraulic filter to see if that’s the issue. Does anybody know how much hydraulic fluid it holds? Thanks for all the help

Do have the dipstick under your seat?

 

[Dsdecker7]

Yes

 

[TimberFarm]

Dipstick should tell you if you are low or not.

 

[Dsdecker7]

Thanks to all for the help. Finally found the correct filter and it works fine after curse myself for trying something different. I guess I don’t know more than the people who built it. My filter was choking it down and not letting enough fluid through because it is a different micron filter. Live and learn. Again thanks to you all!

 

[TimberFarm]

What filter are you using now?